| 1 | // SECTION-START[License Header] |
| 2 | // <editor-fold defaultstate="collapsed" desc=" Generated License "> |
| 3 | /* |
| 4 | * Java Object Management and Configuration |
| 5 | * Copyright (C) Christian Schulte, 2005-206 |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * o Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * o Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 21 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| 22 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| 23 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 29 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | * |
| 31 | * $JOMC: ObjectManagerFactory.java 5010 2014-11-17 04:00:16Z schulte $ |
| 32 | * |
| 33 | */ |
| 34 | // </editor-fold> |
| 35 | // SECTION-END |
| 36 | package org.jomc; |
| 37 | |
| 38 | // SECTION-START[Documentation] |
| 39 | // <editor-fold defaultstate="collapsed" desc=" Generated Documentation "> |
| 40 | /** |
| 41 | * Factory for the {@code ObjectManager} singleton. |
| 42 | * |
| 43 | * <dl> |
| 44 | * <dt><b>Identifier:</b></dt><dd>org.jomc.ObjectManagerFactory</dd> |
| 45 | * <dt><b>Name:</b></dt><dd>JOMC ⁑ API</dd> |
| 46 | * <dt><b>Abstract:</b></dt><dd>Yes</dd> |
| 47 | * <dt><b>Final:</b></dt><dd>Yes</dd> |
| 48 | * <dt><b>Stateless:</b></dt><dd>No</dd> |
| 49 | * </dl> |
| 50 | * |
| 51 | * @author <a href="mailto:cs@schulte.it">Christian Schulte</a> 1.0 |
| 52 | * @version 1.0 |
| 53 | */ |
| 54 | // </editor-fold> |
| 55 | // SECTION-END |
| 56 | // SECTION-START[Annotations] |
| 57 | // <editor-fold defaultstate="collapsed" desc=" Generated Annotations "> |
| 58 | @javax.annotation.Generated( value = "org.jomc.tools.SourceFileProcessor 1.8", comments = "See http://www.jomc.org/jomc/1.8/jomc-tools-1.8" ) |
| 59 | // </editor-fold> |
| 60 | // SECTION-END |
| 61 | public abstract class ObjectManagerFactory |
| 62 | { |
| 63 | // SECTION-START[ObjectManagerFactory] |
| 64 | |
| 65 | /** Constant for the name of the class providing the default {@code getObjectManager()} method. */ |
| 66 | private static final String DEFAULT_FACTORY_CLASSNAME = "org.jomc.ri.DefaultObjectManager"; |
| 67 | |
| 68 | /** Constant for the name of the class providing the default {@code ObjectManager} implementation. */ |
| 69 | private static final String DEFAULT_IMPLEMENTATION_CLASSNAME = "org.jomc.ri.DefaultObjectManager"; |
| 70 | |
| 71 | /** Constant for the name of the system property holding the {@code getObjectManager()} method's class name. */ |
| 72 | private static final String SYS_FACTORY_CLASSNAME = "org.jomc.ObjectManagerFactory"; |
| 73 | |
| 74 | /** Constant for the name of the system property holding the {@code ObjectManager} implementation class name. */ |
| 75 | private static final String SYS_IMPLEMENTATION_CLASSNAME = "org.jomc.ObjectManager"; |
| 76 | |
| 77 | /** |
| 78 | * Gets the {@code ObjectManager} singleton instance. |
| 79 | * <p>This method is controlled by system property {@code org.jomc.ObjectManagerFactory} providing the name of a |
| 80 | * class declaring a <blockquote>{@code public static ObjectManager getObjectManager( ClassLoader )}</blockquote> |
| 81 | * method called by this method to get the instance to return.</p> |
| 82 | * <p><b>Note:</b><br/> |
| 83 | * The {@code newObjectManager} method should be used by {@code getObjectManager} implementors to retrieve a new |
| 84 | * {@code ObjectManager} implementation.</p> |
| 85 | * |
| 86 | * @param classLoader The class loader to use for getting the singleton instance; {@code null} to use the platform's |
| 87 | * bootstrap class loader. |
| 88 | * |
| 89 | * @return The {@code ObjectManager} singleton instance. |
| 90 | * |
| 91 | * @see #newObjectManager(java.lang.ClassLoader) |
| 92 | * |
| 93 | * @throws ObjectManagementException if getting the singleton instance fails. |
| 94 | */ |
| 95 | public static ObjectManager getObjectManager( final ClassLoader classLoader ) |
| 96 | { |
| 97 | try |
| 98 | { |
| 99 | return (ObjectManager) Class.forName( System.getProperty( |
| 100 | SYS_FACTORY_CLASSNAME, DEFAULT_FACTORY_CLASSNAME ), false, classLoader ). |
| 101 | getMethod( "getObjectManager", ClassLoader.class ).invoke( null, classLoader ); |
| 102 | |
| 103 | } |
| 104 | catch ( final Exception e ) |
| 105 | { |
| 106 | throw new ObjectManagementException( getMessage( e ), e ); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Creates a new {@code ObjectManager} instance. |
| 112 | * <p>The object manager implementation returned by this method is controlled by system property |
| 113 | * {@code org.jomc.ObjectManager} providing the name of the {@code ObjectManager} implementation class to return |
| 114 | * a new instance of.</p> |
| 115 | * |
| 116 | * @param classLoader The class loader to use for creating the instance; {@code null} to use the platform's |
| 117 | * bootstrap class loader. |
| 118 | * |
| 119 | * @return A new {@code ObjectManager} instance. |
| 120 | * |
| 121 | * @throws ObjectManagementException if creating a new {@code ObjectManager} instance fails. |
| 122 | */ |
| 123 | public static ObjectManager newObjectManager( final ClassLoader classLoader ) |
| 124 | { |
| 125 | try |
| 126 | { |
| 127 | return Class.forName( System.getProperty( |
| 128 | SYS_IMPLEMENTATION_CLASSNAME, DEFAULT_IMPLEMENTATION_CLASSNAME ), false, classLoader ). |
| 129 | asSubclass( ObjectManager.class ).newInstance(); |
| 130 | |
| 131 | } |
| 132 | catch ( final Exception e ) |
| 133 | { |
| 134 | throw new ObjectManagementException( getMessage( e ), e ); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | private static String getMessage( final Throwable t ) |
| 139 | { |
| 140 | return t != null |
| 141 | ? t.getMessage() != null && t.getMessage().trim().length() > 0 |
| 142 | ? t.getMessage() |
| 143 | : getMessage( t.getCause() ) |
| 144 | : null; |
| 145 | |
| 146 | } |
| 147 | |
| 148 | // SECTION-END |
| 149 | // SECTION-START[Constructors] |
| 150 | // <editor-fold defaultstate="collapsed" desc=" Generated Constructors "> |
| 151 | /** Creates a new {@code ObjectManagerFactory} instance. */ |
| 152 | @javax.annotation.Generated( value = "org.jomc.tools.SourceFileProcessor 1.8", comments = "See http://www.jomc.org/jomc/1.8/jomc-tools-1.8" ) |
| 153 | public ObjectManagerFactory() |
| 154 | { |
| 155 | // SECTION-START[Default Constructor] |
| 156 | super(); |
| 157 | // SECTION-END |
| 158 | } |
| 159 | // </editor-fold> |
| 160 | // SECTION-END |
| 161 | // SECTION-START[Dependencies] |
| 162 | // SECTION-END |
| 163 | // SECTION-START[Properties] |
| 164 | // SECTION-END |
| 165 | // SECTION-START[Messages] |
| 166 | // SECTION-END |
| 167 | } |